CD4 FoxP3 T regulatory cell subsets in myasthenia gravis patients.

Although myasthenia gravis (MG) is a classic autoantibody-mediated disease, T cells are centrally involved in its pathogenesis. In recent years a number of studies have analyzed the role of CD4 FoxP3 regulatory T cells (T) in the disease with contradictory results. Here, the generation of T was significantly reduced in thymoma as compared to thymic hyperplasia and normal thymus tissue (p=0.0002). In the peripheral blood, T subsets classified according to CD49d, HELIOS and CD45RA expression changed after thymectomy and in the long-term course of immunosuppression. Compared to healthy volunteers the frequency of CD45RAFoxP3 T was reduced in MG patients in general (p=0.037) and in particular in patients without immunosuppression (p=0.036). In our study, thymectomy and immunosuppressive treatment were associated with changes in T subpopulations. The reduced frequency of CD45RAFoxP3 T we observed in MG patients might play a role in MG pathogenesis.